Not a whole lot of info, but check page 24.
http://www.norcalmotorsports.org/users/bryan/mods/2014_FiST/R2+Parts+Manual+V5.7.pdf
http://www.norcalmotorsports.org/users/bryan/mods/2014_FiST/R2+Parts+Manual+V5.7.pdf
its available at $250 PER HUB